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Problems with fuel gauge

Discussion in '360/430' started by Easy888, Oct 19, 2009.

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  1. Easy888

    Easy888 Formula Junior

    Sep 28, 2006
    517
    CA, NV
    Full Name:
    Jim
    #1 Easy888, Oct 19, 2009
    Guys, my MY2000 360 coupe just crapped its fuel gauge out. The digital fuel gauge reads completely empty despite having fuel in the car. In fact I filled it up and restarted the car hoping it was a glitch that would go away but not so.

    Anyone else experience this problem? Is it an easy fix?

    Thanks.
     
  2. chrmer3

    chrmer3 Formula 3

    May 19, 2006
    1,719
    USSA
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    Chris
    #2 chrmer3, Oct 19, 2009
    I believe bad sending units on the early 360's were common... Usually incorrect read errors on fill level..

    Do a search you should find much info on bad fuel sending units
     
  3. E60 M5

    E60 M5 Moderator
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    Jan 2, 2006
    8,179
    Wash DC area
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    Robert
    #3 E60 M5, Oct 19, 2009
  4. Easy888

    Easy888 Formula Junior

    Sep 28, 2006
    517
    CA, NV
    Full Name:
    Jim
    #4 Easy888, Oct 19, 2009
    Thanks guys for the link.

    My gas did read 3/4 full before as per the issue with the thread link. However it now completely reads nothing. I wonder if the same part or fix will amend the issue?
     
  5. RayJohns

    RayJohns F1 Veteran
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    May 21, 2006
    7,944
    West Coast
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    Ray
    #5 RayJohns, Oct 19, 2009
    Last edited: Oct 19, 2009
    there is probably a good chance. I would check to see if a fuse has blown first. If not, then it's quite possible the sending unit in the tank (that little arm you see in the pics) has gone out or shorted out or something. Might not be a bad idea to kill the power and turn it back on just to make sure also.

    Ray
     
  6. mr_bock

    mr_bock Formula 3

    Oct 27, 2006
    1,373
    FL full time
    #6 mr_bock, Oct 20, 2009
    If you do need to replace the sending unit/arm ass'y, search The Forum for Ray John's great write up DIY. This helped me alot when I did the replacement to get a 'full tank' reading. Not a difficult job. Take your time and be CAREFUL because you are working around gas and vapors. The dealer wanted lots of $$$$$ to do this. The part was about $110 USD.
     
  7. numisrx

    numisrx Formula Junior
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    Jul 4, 2007
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    Pasadena, CA
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    Wayne
    #7 numisrx, Oct 20, 2009
    The guage on my '99 was reading incorrectly and I was advised that sometimes the sending unit gets "gunked up" and after a couple of tanks of gas with some fuel treatment it started working fine (has for 2 years). Might be worth a try for a really cheap fix.
     
  8. allcarjoe

    allcarjoe Rookie

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    Giuseppe Passarelli
    #8 allcarjoe, Oct 2, 2025 at 11:28 AM
    on my 2000 360 i have replaced the fuel sending unit from scuderia and fuel gauge still does not work , all fuses are good any one have wiring diagram or know a common issue with this gauge is on E and dash shows the fuel pump icon
     
  9. Qavion

    Qavion F1 World Champ
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    Feb 20, 2015
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    Ian Riddell
    #9 Qavion, Oct 2, 2025 at 3:56 PM
    Last edited: Oct 2, 2025 at 4:04 PM
    There are no fuses as the instrument binnacle provides power. All you can do is check the ground wire (black/violet) and look for some kind of power coming from the dash on the violet/yellow wire with the key turned on. Also check the resistance across the new sender itself to see if it's ok.

    An open circuit will give you an empty indication and a light.

    The wiring goes through these plugs behind the left hand seat (if access to the pump is difficult)

    Image Unavailable, Please Login

    Specifically, the white plugs.

    Part of the wiring shown here:

    Image Unavailable, Please Login


    See 27L (sender/pump) and 21T (ground)

    The ground is on the rear of the left hand engine cam cover.

    Image Unavailable, Please Login

    Let me know if you need further details.
     

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